[device/celestica]: rm rcload cmd on led_proc_init of silverstone

Author: Wirut Getbamrung

device/celestica/x86_64-cel_silverstone-r0/led_proc_init.soc

@@ -1,6 +1,5 @@
 #The Port LED of Silverstone SONIC can't work well, after the issue is fixed by SAI, The led will start. 
 #led auto on; led start
-rcload /usr/share/sonic/hwsku/pre-emphasis_PAM4_optics.soc
 sleep 10
 linkscan off
 m0 load 0 0x3800 /usr/share/sonic/platform/custom.bin